<script>
export default {
  name: 'EditableInput',
  props: {
    label: String,
    labelText: String,
    desc: String,
    value: [String, Number],
    max: Number,
    min: Number,
    arrowOffset: {
      type: Number,
      default: 1,
    },
  },
  computed: {
    val: {
      get() {
        return this.value;
      },
      set(v) {
        // TODO: min
        if (!(this.max === undefined) && +v > this.max)
          this.$refs.input.value = this.max;
        else
          return v;
      },
    },
    labelId() {
      return `input__label__${this.label}__${Math.random().toString().slice(2, 5)}`;
    },
    labelSpanText() {
      return this.labelText || this.label;
    },
  },
  methods: {
    update(e) {
      this.handleChange(e.target.value);
    },
    handleChange(newVal) {
      const data = {};
      data[this.label] = newVal;
      if (data.hex === undefined && data['#'] === undefined)
        this.$emit('change', data);
      else if (newVal.length > 5)
        this.$emit('change', data);
    },
    // **** unused
    // handleBlur (e) {
    //   console.log(e)
    // },
    handleKeyDown(e) {
      let { val } = this;
      const number = Number(val);

      if (number) {
        const amount = this.arrowOffset || 1;

        // Up
        if (e.keyCode === 38) {
          val = number + amount;
          this.handleChange(val);
          e.preventDefault();
        }

        // Down
        if (e.keyCode === 40) {
          val = number - amount;
          this.handleChange(val);
          e.preventDefault();
        }
      }
    },
    // **** unused
    // handleDrag (e) {
    //   console.log(e)
    // },
    // handleMouseDown (e) {
    //   console.log(e)
    // }
  },
};
</script>

<template>
  <div class="vc-editable-input">
    <input
      ref="input"
      v-model="val"
      :aria-labelledby="labelId"
      class="vc-input__input"
      @keydown="handleKeyDown"
      @input="update"
    >
    <span :id="labelId" :for="label" class="vc-input__label">{{ labelSpanText }}</span>
    <span class="vc-input__desc">{{ desc }}</span>
  </div>
</template>

<style>
.vc-editable-input {
  position: relative;
}
.vc-input__input {
  padding: 0;
  border: 0;
  outline: none;
}
.vc-input__label {
  text-transform: capitalize;
}
</style>
